What is the rumbling sound coming from the water heater?

Water heater repair and replacement service in Sonora, CA and surrounding Mother Lode areas.

The rumbling or knocking sounds can be an indication that sediment has built up on the bottom of the hot water heater. Water can become trapped in this sediment and begin to boil as it heats. This means the water heater is not operating efficiently and the sediment isn’t allowing the heat to transfer to the water in the tank.  You may try draining a few gallons of water off the bottom of the water heater tank. This is done by attaching a drain hose to the valve at the bottom of the tank. Allow it to drain for about five minutes. Many newer water heater models have a new feature that prevents the buildup of sediment in the bottom of the hot water heater tank. If your heater is an older model, it may be cost effective to replace the water heater if the buildup is severe. Contact Robertson Plumbing for an inspection of your water heater or to replace your old model with a newer more efficient model.

WARNING: Hot water is dangerous. Please contact a professional plumber to ensure the proper repairs or replacement of the hot water heater.